I have User Defaults (Preferences) like:
MainDict =
{
Peter = { Income = 20, Age = 77 },
Nancy = { Income = 24, Age = 37 }
}
That is, the preferences contain a dictionary (MainDict) which
contains two sub-dictionaries (Peter and Nancy).
When in IB I bind an NSTextField to:
Shared Defaults
Controller Key: values
Model Key Path: MainDict.Peter.Age
and set the text field to 88, my preferences will contain a new entry:
MainDict.Peter.Age = 88
but the MainDict remains unchanged.
And when I do programmatically:
NSUserDefaultsController *s = [ NSUserDefaultsController
sharedUserDefaultsController ];
[[s values] setValue: [ NSNumber numberWithInt: 88 ] forKeyPath:
@"MainDict.Peter.Age" ];
I get an exception:
...[<NSUserDefaultsController 0x13c230> valueForUndefinedKey:]: this
class is not key value coding-compliant for the key MainDict.
So, obviously, I have some fundamental misunderstandings.
A related question: In Tiger I often used a Model Key Path containing
blanks. Now IB (Version 3.1.1 (672)) does no longer allows me to enter
this.
Where is the definition of a valid key path to be found?
Kind regards,
Gerriet.
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